Overheating - United Bimmer Community

**neo66** · 06-10-2007, 01:39 PM

I have a E36 328i touring with a overheating problem......I have replaced the radiator as it was damaged,replaced the thermostat and housing,the water pump was checked and nothing found,there is no water loss that i can see,the top hose is hot and the bottom hse is cold,i have tried to bleed the system as i thought it might be an air lock,not sure what to do now......can some one help......

**stevo** · 06-10-2007, 02:56 PM

there are lots of threads about ovrheating, use the search button at the top of this page, it could be the switch in the side of your radiator or maybe even though you tried bleeding the system it may still have air in it these cars are notoriously hard to bleed.

**Dudesky** · 06-11-2007, 07:37 PM

Not hard at all to bleed. First timers usually get it wrong though.

1) Remove bleeder screw.

2) Start engine, set the heater on hot and turn the fan on full blast.

3) Rev the car at around 2500rpm, and watch the coolant and bubbles flow out of the bleeder hole. This will be messy . . live with it.

4) As you lose coolant through the bleeder hole be ready to replace it through the expansion tank.

5) Once the bubbles stop coming out, check the heater vents. If they're blowing out hot air and the bubbles have stopped, you are done. Put the bleeder screw back on. Let the car sit overnite or whatever, and check the coolant level in the morning, top off as needed.

**c1apton** · 06-11-2007, 07:39 PM

I'm curious as to how you "tested" the waterpump?

**neo66** · 06-13-2007, 05:05 PM

Quote:

Originally Posted by c1apton

I'm curious as to how you "tested" the waterpump?

The water pump was not tested,it was checked.....it was removed and a visual check and inspection.......no broken fins cracks i meen it looked OK......im no water pump expert but it just looked OK.....

**MTurboPower3** · 06-13-2007, 05:07 PM

maybe its the air intake, afterall it takes in cold air and cools the engine but not as much as the water pump.

**Dudesky** · 06-13-2007, 07:07 PM

^^^Huh??????

**mullethunter3** · 06-13-2007, 07:59 PM

Ditto on that, Chrys.

Kid, do you know how an engine and all the peripherals work together?

**stevo** · 06-14-2007, 12:33 AM

Quote:

Originally Posted by MTurboPower3

maybe its the air intake, afterall it takes in cold air and cools the engine but not as much as the water pump.

no disrespect intended but perhaps you should read up a little on how an engine actually works before posting nonsense statements like that^

**xsperf** · 06-14-2007, 09:46 AM

it sounds like from your original post that you actually DID bleed the system, if you DID bleed the system and it is overheating, check and see if there is anything blocking the airflow to your radiator, and also check and see if your aux fan is working

we'd need more details, does it only overheat when you are stopped in traffic or on the highway as well? does the heater blow out hot air?

**gabe_beamer** · 06-19-2007, 12:08 PM

your water pump is gone or your head gasket is cracked...